MGI US Large Cap Growth Equity Fund

MGI US Large Cap Growth Equity Fund

Investment Objective

The investment objective of the Fund is to provide long-term total return, which includes capital appreciation and income.

Fees and Expenses

These tables summarize the fees and expenses that you may pay if you invest in the Class S Shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	MGI US Large Cap Growth Equity Fund Class S Shares Class S
Redemption Fee on shares owned less than 30 days (as a % of total redemption proceeds)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		MGI US Large Cap Growth Equity Fund Class S Shares Class S
Management Fees		0.55%
Distribution and/or Service (12b-1) Fees		0.25%
Other Expenses (including custodial, legal, audit, transfer agent and sub-transfer agent payments, Trustees' fees and expenses, and an internal administrative fee of 0.15% paid by the Class S shares of the Fund to the Advisor)	[1]	0.34%
Acquired Fund Fees and Expenses		none
Total Annual Fund Operating Expenses		1.14%
Management Fee Waiver/Expense Reimbursements		0.07%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	1.07%

Example

The example below is intended to help you compare the costs of investing in the Class S Shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Class S shares of the Fund for the time periods shown, that your investment has a 5% return each year, and that the Fund’s operating expenses remain the same as shown above.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
MGI US Large Cap Growth Equity Fund Class S Shares Class S	109	355	621	1,380

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 106% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests principally in equity securities (such as common stock) issued by large capitalization U.S. companies. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in the equity securities of large capitalization U.S. companies. For purposes of this investment policy, the Fund considers “large capitalization U.S. companies” to be U.S. companies, at the time of investment, whose market capitalizations exceed the market capitalization of the smallest company included in the Russell 1000^® Growth Index, as measured at the end of the preceding month (as of June 30, 2011, $1.42 billion). (If the Fund changes this investment policy, the Fund will notify shareholders at least 60 days in advance of the change.) Generally, the Fund invests in companies that have higher earnings and/or revenue growth histories or expectations relative to the Russell 1000^® Index.

Principal Risk Factors

The principal risks that could adversely affect the value of the Fund’s shares and the total return on your investment include:

Growth Stock Risk. Companies with strong growth potential (both domestic and foreign) tend to have higher than average price-to-earnings ratios, meaning that these stocks are more expensive than average relative to the companies’ earnings. The market prices of equity securities of growth companies are often quite volatile, since the prices may be particularly sensitive to economic, market, or company developments and may present a greater degree of risk of loss.

Management Techniques Risk. The investment strategies, techniques, and risk analyses employed by the subadvisors, while designed to enhance potential returns, may not produce the desired results. The subadvisors may be incorrect in their assessments of the values of securities or their assessments of market trends, which can result in losses to the Fund.

Market Risk. The risk that movements in financial markets will adversely affect the prices of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. The market as a whole may not favor the types of investments the Fund makes. Also, there is the risk that the price(s) of one or more of the securities or other instruments in the Fund’s portfolio will fall, or will fail to rise. Many factors can adversely affect a security’s performance, including both general financial market conditions and factors related to a specific company, industry, country, or geographic region.

Portfolio Turnover Risk. Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in higher brokerage commissions and transaction costs (which could reduce investment returns), and capital gains.

The Fund is not intended to serve as a complete investment program.

Performance of the Fund

The following bar chart and table give some indication of the risks of investing in the Fund by showing changes in the performance of the Fund’s Class Y-3 shares from year to year and comparing the Fund’s average annual returns over time with a broad measure of market performance.

Class S shares of the Fund had not commenced operations as of the date of this prospectus. The returns of the Class S shares would have been substantially similar to the returns of Class Y-3 shares; however, because the Class S shares are subject to a 12b-1 fee and an internal administrative fee, while the Class Y-3 shares are not, the returns of the Class S shares would have been lower than those shown for Class Y-3 shares.

The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

(2006 is Class Y-3’s first full calendar year of operation)

Calendar Year

The Fund’s calendar year-to-date return as of June 30, 2011 was 6.91%.

The Fund’s highest return for a quarter during the periods shown above was 15.01%, for the quarter ended September 30, 2010.

The Fund’s lowest return for a quarter during the periods shown above was -23.66%, for the quarter ended December 31, 2008.

Average Annual Total Returns For the Periods Ended December 31, 2010

Average Annual Total Returns MGI US Large Cap Growth Equity Fund Class S Shares	Column	Label		Index No Deduction for Fees, Expenses, Taxes [Text]	1 Year	5 Years	Life of Fund	Inception Date
Return Before Taxes Class Y-3	MGI US Large Cap Growth Equity Fund – Class Y-3 Shares	Return Before Taxes			18.51%	2.92%	3.68%	Aug. 15, 2005
Return After Taxes on Distributions Class Y-3	MGI US Large Cap Growth Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions			18.45%	2.71%	3.45%	Aug. 15, 2005
Return After Taxes on Distributions and Sale of Fund Shares Class Y-3	MGI US Large Cap Growth Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions and Sale of Fund Shares			12.12%	2.45%	3.10%	Aug. 15, 2005
Russell 1000 Growth Index		Russell 1000® Growth Index	[1]	(reflects no deduction for fees, expenses, or taxes)	16.71%	3.75%	4.01%	Aug. 15, 2005

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

MGI US Large Cap Value Equity Fund

MGI US Large Cap Value Equity Fund

Investment Objective

The investment objective of the Fund is to provide long-term total return, which includes capital appreciation and income.

Fees and Expenses

These tables summarize the fees and expenses that you may pay if you invest in the Class S Shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	MGI US Large Cap Value Equity Fund Class S Shares Class S
Redemption Fee on shares owned less than 30 days (as a % of total redemption proceeds)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		MGI US Large Cap Value Equity Fund Class S Shares Class S
Management Fees		0.53%
Distribution and/or Service (12b-1) Fees		0.25%
Other Expenses (including custodial, legal, audit, transfer agent and sub-transfer agent payments, Trustees' fees and expenses, and an internal administrative fee of 0.15% paid by the Class S shares of the Fund to the Advisor)	[1]	0.35%
Acquired Fund Fees and Expenses		none
Total Annual Fund Operating Expenses		1.13%
Management Fee Waiver/Expense Reimbursements		0.08%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	1.05%

Example

The example below is intended to help you compare the costs of investing in the Class S Shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Class S shares of the Fund for the time periods shown, that your investment has a 5% return each year, and that the Fund’s operating expenses remain the same as shown above.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
MGI US Large Cap Value Equity Fund Class S Shares Class S	107	351	615	1,367

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 117% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests principally in equity securities (such as common stock) issued by large capitalization U.S. companies. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in the equity securities of large capitalization U.S. companies. For purposes of this investment policy, the Fund considers “large capitalization U.S. companies” to be companies, at the time of investment, whose market capitalizations exceed the market capitalization of the smallest company included in the Russell 1000^® Value Index, as measured at the end of the preceding month (as of June 30, 2011, $660 million). Generally, the Fund invests in stocks that appear to be undervalued based on the stocks’ intrinsic values relative to their current market prices.

Principal Risk Factors

The principal risks that could adversely affect the value of the Fund’s shares and the total return on your investment include:

Value Stock Risk. Value stocks represent companies that tend to have lower than average price to earnings ratios and are therefore cheaper than average relative to the companies’ earnings. These companies may have relatively weak balance sheets and, during economic downturns, these companies may have insufficient cash flow to pay their debt obligations and difficulty finding additional financing needed for their operations. A particular value stock may not increase in price, as anticipated by a subadvisor, if other investors fail to recognize the stock’s value or the catalyst that the subadvisor believes will increase the price of the stock does not affect the price of the stock in the manner or to the degree that the subadvisor anticipates. Also, cyclical stocks tend to increase in value more quickly during economic upturns than non-cyclical stocks, but also tend to lose value more quickly in economic downturns.

Management Techniques Risk. The investment strategies, techniques, and risk analyses employed by the subadvisors, while designed to enhance potential returns, may not produce the desired results. The subadvisors may be incorrect in their assessments of the values of securities or their assessments of market trends, which can result in losses to the Fund.

Market Risk. The risk that movements in financial markets will adversely affect the prices of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. The market as a whole may not favor the types of investments the Fund makes. Also, there is the risk that the price(s) of one or more of the securities or other instruments in the Fund’s portfolio will fall, or will fail to rise. Many factors can adversely affect a security’s performance, including both general financial market conditions and factors related to a specific company, industry, country, or geographic region.

Portfolio Turnover Risk. Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in higher brokerage commissions and transaction costs (which could reduce investment returns), and capital gains.

The Fund is not intended to serve as a complete investment program.

Performance of the Fund

The following bar chart and table give some indication of the risks of investing in the Fund by showing changes in the performance of the Fund’s Class Y-3 shares from year to year and comparing the Fund’s average annual returns over time with a broad measure of market performance.

Class S shares of the Fund had not commenced operations as of the date of this prospectus. The returns of the Class S shares would have been substantially similar to the returns of Class Y-3 shares; however, because the Class S shares are subject to a 12b-1 fee and an internal administrative fee, while the Class Y-3 shares are not, the returns of the Class S shares would have been lower than those shown for Class Y-3 shares.

The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

(2006 is Class Y-3’s first full calendar year of operation)

Calendar Year

The Fund’s calendar year-to-date return as of June 30, 2011 was 7.25%.

The Fund’s highest return for a quarter during the periods shown above was 16.39%, for the quarter ended September 30, 2009.

The Fund’s lowest return for a quarter during the periods shown above was -22.05%, for the quarter ended December 31, 2008.

Average Annual Total Returns For the Periods Ended December 31, 2010

Average Annual Total Returns MGI US Large Cap Value Equity Fund Class S Shares	Column	Label		Index No Deduction for Fees, Expenses, Taxes [Text]	1 Year	5 Years	Life of Fund	Inception Date
Return Before Taxes Class Y-3	MGI US Large Cap Value Equity Fund – Class Y-3 Shares	Return Before Taxes			10.24%	(2.43%)	(1.62%)	Aug. 15, 2005
Return After Taxes on Distributions Class Y-3	MGI US Large Cap Value Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions			10.04%	(2.96%)	(2.14%)	Aug. 15, 2005
Return After Taxes on Distributions and Sale of Fund Shares Class Y-3	MGI US Large Cap Value Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions and Sale of Fund Shares			6.93%	(2.06%)	(1.39%)	Aug. 15, 2005
Russell 1000 Value Index		Russell 1000® Value Index	[1]	(reflects no deduction for fees, expenses, or taxes)	15.51%	1.28%	1.60%	Aug. 15, 2005

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

MGI US Small/Mid Cap Growth Equity Fund

MGI US Small/Mid Cap Growth Equity Fund

Investment Objective

The investment objective of the Fund is to provide long-term total return, comprised primarily of capital appreciation.

Fees and Expenses

These tables summarize the fees and expenses that you may pay if you invest in the Class S Shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	MGI US Small/Mid Cap Growth Equity Fund Class S Shares Class S
Redemption Fee on shares owned less than 30 days (as a % of total redemption proceeds)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		MGI US Small/Mid Cap Growth Equity Fund Class S Shares Class S
Management Fees		0.90%
Distribution and/or Service (12b-1) Fees		0.25%
Other Expenses (including custodial, legal, audit, transfer agent and sub-transfer agent payments, Trustees' fees and expenses, and an internal administrative fee of 0.15% paid by the Class S shares of the Fund to the Advisor)	[1]	0.37%
Acquired Fund Fees and Expenses		none
Total Annual Fund Operating Expenses		1.52%
Management Fee Waiver/Expense Reimbursements		0.10%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	1.42%

Example

The example below is intended to help you compare the costs of investing in the Class S Shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Class S shares of the Fund for the time periods shown, that your investment has a 5% return each year, and that the Fund's operating expenses remain the same as shown above.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
MGI US Small/Mid Cap Growth Equity Fund Class S Shares Class S	145	470	819	1,804

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 107% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests principally in equity securities (such as common stock) issued by small-to-medium capitalization U.S. companies. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in the equity securities of small-to-medium capitalization U.S. companies. For purposes of this investment policy, the Fund considers “small-to-medium capitalization U.S. companies” to be companies with market capitalizations between $25 million and the largest company included in the Russell 2500^TM Index (as of June 30, 2011, $7.47 billion). Generally, the Fund invests in companies that have higher earnings and/or revenue growth histories or expectations relative to the Russell 2500^TM Index.

Principal Risk Factors

The principal risks that could adversely affect the value of the Fund's shares and the total return on your investment include:

Growth Stock Risk. Companies with strong growth potential (both domestic and foreign) tend to have higher than average price-to-earnings ratios, meaning that these stocks are more expensive than average relative to the companies' earnings. The market prices of equity securities of growth companies are often quite volatile, since the prices may be particularly sensitive to economic, market, or company developments and may present a greater degree of risk of loss.

Small and Medium Capitalization Stock Risk. The securities of companies with small and medium capitalizations may involve greater investment risks than securities of companies with large capitalizations. Small and medium capitalization companies may have an unproven or narrow technological base and limited product lines, distribution channels, and market and financial resources, and the small and medium capitalization companies also may be dependent on entrepreneurial management, making the companies more susceptible to certain setbacks and reversals. As a result, the prices of securities of small and medium capitalization companies may be subject to more abrupt or erratic movements than securities of larger companies, may have limited marketability, and may be less liquid than securities of companies with larger capitalizations. Foreign companies with large capitalizations may be relatively small by U.S. standards and may be subject to risks that are similar to the risks that may affect small and medium capitalization U.S. companies. Securities of small and medium capitalization companies also may pay no, or only small, dividends.

Management Techniques Risk. The investment strategies, techniques, and risk analyses employed by the subadvisors, while designed to enhance potential returns, may not produce the desired results. The subadvisors may be incorrect in their assessments of the values of securities or their assessments of market trends, which can result in losses to the Fund.

Market Risk. The risk that movements in financial markets will adversely affect the prices of the Fund's investments, regardless of how well the companies in which the Fund invests perform. The market as a whole may not favor the types of investments the Fund makes. Also, there is the risk that the price(s) of one or more of the securities or other instruments in the Fund's portfolio will fall, or will fail to rise. Many factors can adversely affect a security's performance, including both general financial market conditions and factors related to a specific company, industry, country, or geographic region.

Portfolio Turnover Risk. Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in higher brokerage commissions and transaction costs (which could reduce investment returns), and capital gains.

The Fund is not intended to serve as a complete investment program.

Performance of the Fund

The following bar chart and table give some indication of the risks of investing in the Fund by showing changes in the performance of the Fund's Class Y-3 shares from year to year and comparing the Fund's average annual returns over time with a broad measure of market performance.

Class S shares of the Fund had not commenced operations as of the date of this prospectus. The returns of the Class S shares would have been substantially similar to the returns of Class Y-3 shares; however, because the Class S shares are subject to a 12b-1 fee and an internal administrative fee, while the Class Y-3 shares are not, the returns of the Class S shares would have been lower than those shown for Class Y-3 shares.

The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

(2006 is Class Y-3's first full calendar year of operation)

Calendar Year

The Fund's calendar year-to-date return as of June 30, 2011 was 9.77%.

The Fund's highest return for a quarter during the periods shown above was 17.29%, for the quarter ended June 30, 2009.

The Fund's lowest return for a quarter during the periods shown above was -26.99%, for the quarter ended December 31, 2008.

Average Annual Total Returns For the Periods Ended December 31, 2010

Average Annual Total Returns MGI US Small/Mid Cap Growth Equity Fund Class S Shares	Column	Label		Index No Deduction for Fees, Expenses, Taxes [Text]	1 Year	5 Years	Life of Fund	Inception Date
Return Before Taxes Class Y-3	MGI US Small/Mid Cap Growth Equity Fund – Class Y-3 Shares	Return Before Taxes			25.11%	3.97%	5.26%	Aug. 15, 2005
Return After Taxes on Distributions Class Y-3	MGI US Small/Mid Cap Growth Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions			25.11%	3.28%	4.55%	Aug. 15, 2005
Return After Taxes on Distributions and Sale of Fund Shares Class Y-3	MGI US Small/Mid Cap Growth Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions and Sale of Fund Shares			16.32%	3.10%	4.22%	Aug. 15, 2005
Russell 2500? Growth Index		Russell 2500TM Growth Index	[1]	(reflects no deduction for fees, expenses, or taxes)	28.86%	5.63%	6.04%	Aug. 15, 2005

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

MGI US Small/Mid Cap Value Equity Fund

MGI US Small/Mid Cap Value Equity Fund

Investment Objective

The investment objective of the Fund is to provide long-term total return, comprised primarily of capital appreciation.

Fees and Expenses

These tables summarize the fees and expenses that you may pay if you invest in the Class S Shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	MGI US Small/Mid Cap Value Equity Fund Class S Shares Class S
Redemption Fee on shares owned less than 30 days (as a % of total redemption proceeds)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		MGI US Small/Mid Cap Value Equity Fund Class S Shares Class S
Management Fees		0.90%
Distribution and/or Service (12b-1) Fees		0.25%
Other Expenses (including custodial, legal, audit, transfer agent and sub-transfer agent payments, Trustees' fees and expenses, and an internal administrative fee of 0.15% paid by the Class S shares of the Fund to the Advisor)	[1]	0.37%
Acquired Fund Fees and Expenses		none
Total Annual Fund Operating Expenses		1.52%
Management Fee Waiver/Expense Reimbursements		0.10%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	1.42%

Example

The example below is intended to help you compare the costs of investing in the Class S Shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Class S shares of the Fund for the time periods shown, that your investment has a 5% return each year, and that the Fund's operating expenses remain the same as shown above.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
MGI US Small/Mid Cap Value Equity Fund Class S Shares Class S	145	470	819	1,804

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 95% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests principally in equity securities (such as common stock) issued by small-to-medium capitalization U.S. companies. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in the equity securities of small-to-medium capitalization U.S. companies. For purposes of this investment policy, the Fund considers “small-to-medium capitalization U.S. companies” to be companies with market capitalizations between $25 million and the largest company included in the Russell 2500^TM Index (as of June 30, 2011, $7.47 billion). Generally, the Fund invests in stocks that appear to be undervalued based on the stocks' intrinsic values relative to their current market prices.

Principal Risk Factors

The principal risks that could adversely affect the value of the Fund's shares and the total return on your investment include:

Value Stock Risk. Value stocks represent companies that tend to have lower than average price to earnings ratios and are therefore cheaper than average relative to the companies' earnings. These companies may have relatively weak balance sheets and, during economic downturns, these companies may have insufficient cash flow to pay their debt obligations and difficulty finding additional financing needed for their operations. A particular value stock may not increase in price, as anticipated by the subadvisor, if other investors fail to recognize the stock's value or the catalyst that the subadvisor believes will increase the price of the stock does not affect the price of the stock in the manner or to the degree that the subadvisor anticipates. Also, cyclical stocks tend to increase in value more quickly during economic upturns than non-cyclical stocks, but also tend to lose value more quickly in economic downturns.

Small and Medium Capitalization Company Risk. The securities of companies with small and medium capitalizations may involve greater investment risks than securities of companies with large capitalizations. Small and medium capitalization companies may have an unproven or narrow technological base and limited product lines, distribution channels, and market and financial resources, and the small and medium capitalization companies also may be dependent on entrepreneurial management, making the companies more susceptible to certain setbacks and reversals. As a result, the prices of securities of small and medium capitalization companies may be subject to more abrupt or erratic movements than securities of larger companies, may have limited marketability, and may be less liquid than securities of companies with larger capitalizations. Foreign companies with large capitalizations may be relatively small by U.S. standards and may be subject to risks that are similar to the risks that may affect small and medium capitalization U.S. companies. Securities of small and medium capitalization companies also may pay no, or only small, dividends.

Management Techniques Risk. The investment strategies, techniques, and risk analyses employed by the subadvisors, while designed to enhance potential returns, may not produce the desired results. The subadvisors may be incorrect in their assessments of the values of securities or their assessments of market trends, which can result in losses to the Fund.

Market Risk. The risk that movements in financial markets will adversely affect the prices of the Fund's investments, regardless of how well the companies in which the Fund invests perform. The market as a whole may not favor the types of investments the Fund makes. Also, there is the risk that the price(s) of one or more of the securities or other instruments in the Fund's portfolio will fall, or will fail to rise. Many factors can adversely affect a security's performance, including both general financial market conditions and factors related to a specific company, industry, country, or geographic region.

Portfolio Turnover Risk. Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in higher brokerage commissions and transaction costs (which could reduce investment returns), and capital gains.

The Fund is not intended to serve as a complete investment program.

Performance of the Fund

The following bar chart and table give some indication of the risks of investing in the Fund by showing changes in the performance of the Fund's Class Y-3 shares from year to year and comparing the Fund's average annual returns over time with a broad measure of market performance.

Class S shares of the Fund had not commenced operations as of the date of this prospectus. The returns of the Class S shares would have been substantially similar to the returns of Class Y-3 shares; however, because the Class S shares are subject to a 12b-1 fee and an internal administrative fee, while the Class Y-3 shares are not, the returns of the Class S shares would have been lower than those shown for Class Y-3 shares.

The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

(2006 is Class Y-3's first full calendar year of operation)

Calendar Year

The Fund's calendar year-to-date return as of June 30, 2011 was 5.66%.

The Fund's highest return for a quarter during the periods shown above was 20.32%, for the quarter ended September 30, 2009.

The Fund's lowest return for a quarter during the periods shown above was -28.05%, for the quarter ended December 31, 2008.

Average Annual Total Returns For the Periods Ended December 31, 2010

Average Annual Total Returns MGI US Small/Mid Cap Value Equity Fund Class S Shares	Column	Label		Index No Deduction for Fees, Expenses, Taxes [Text]	1 Year	5 Years	Life of Fund	Inception Date
Return Before Taxes Class Y-3	MGI US Small/Mid Cap Value Equity Fund – Class Y-3 Shares	Return Before Taxes			26.26%	2.04%	2.13%	Aug. 15, 2005
Return After Taxes on Distributions Class Y-3	MGI US Small/Mid Cap Value Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions			25.86%	1.44%	1.56%	Aug. 15, 2005
Return After Taxes on Distributions and Sale of Fund Shares Class Y-3	MGI US Small/Mid Cap Value Equity Fund – Class Y-3 Shares	Return After Taxes on Distributions and Sale of Fund Shares			17.10%	1.49%	1.58%	Aug. 15, 2005
Russell 2500? Value Index		Russell 2500TM Value Index	[1]	(reflects no deduction for fees, expenses, or taxes)	24.82%	3.85%	3.88%	Aug. 15, 2005

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

MGI Non-US Core Equity Fund

MGI Non-US Core Equity Fund

Investment Objective

The investment objective of the Fund is to provide long-term total return, which includes capital appreciation and income.

Fees and Expenses

These tables summarize the fees and expenses that you may pay if you invest in the Class S Shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	MGI Non-US Core Equity Fund Class S Shares Class S
Redemption Fee on shares owned less than 30 days (as a % of total redemption proceeds)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		MGI Non-US Core Equity Fund Class S Shares Class S
Management Fees		0.75%
Distribution and/or Service (12b-1) Fees		0.25%
Other Expenses (including custodial, legal, audit, transfer agent and sub-transfer agent payments, Trustees' fees and expenses, and an internal administrative fee of 0.15% paid by the Class S shares of the Fund to the Advisor)	[1]	0.42%
Acquired Fund Fees and Expenses		none
Total Annual Fund Operating Expenses		1.42%
Management Fee Waiver/Expense Reimbursements		0.10%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	1.32%

Example

The example below is intended to help you compare the costs of investing in the Class S Shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Class S shares of the Fund for the time periods shown, that your investment has a 5% return each year, and that the Fund’s operating expenses remain the same as shown above.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
MGI Non-US Core Equity Fund Class S Shares Class S	134	440	767	1,693

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 87% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests principally in equity securities (such as common stock) issued by non-U.S. companies of any capitalization, located in the world’s developed and emerging capital markets. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in the equity securities of non-U.S. companies.

Securities of non-U.S. companies generally include all securities included in the Fund’s benchmark index. In addition, securities of non-U.S. companies may include: (a) securities of companies that are organized under the laws of, or maintain their principal places of business in, countries other than the United States; (b) securities for which the principal trading market is in a country other than the United States; (c) securities issued or guaranteed by the government of a country other than the United States, such government’s agencies or instrumentalities, or the central bank of such country; (d) securities denominated in the currency issued by a country other than the United States; (e) securities of companies that derive at least 50% of their revenues or profits from goods produced or sold, investments made, or services performed in a country other than the United States or have at least 50% of their assets in countries other than the United States; (f) equity securities of companies in countries other than the United States, in the form of depositary receipts; or (g) securities issued by pooled investment vehicles that invest primarily in securities or derivative instruments that derive their value from securities of non-U.S. companies.

Principal Risk Factors

The principal risks that could adversely affect the value of the Fund’s shares and the total return on your investment include:

Foreign Investments Risk. Investing in foreign securities typically involves more risks than investing in U.S. securities. These risks can increase the potential for losses in the Fund and affect its share price. Generally, securities of many foreign issuers may be less liquid, and their prices may be more volatile, than the securities of comparable U.S. issuers. Transaction costs for foreign securities generally are higher than for comparable securities issued in the United States. Many foreign governments may supervise and regulate their financial markets less stringently than the United States government does. In addition, foreign issuers generally are not subject to the same types of accounting, auditing, or financial reporting standards as those that are applicable to U.S. issuers. As a result, with respect to foreign issuers, there may be less publicly available information regarding their operations and financial conditions, and the information that is available may be less reliable.

Currency Exchange Rate Risk. Foreign securities may be issued and traded in foreign currencies. As a result, the values of foreign securities may be affected by changes in exchange rates between foreign currencies and the U.S. dollar, as well as between currencies of countries other than the United States. For example, if the value of the U.S. dollar increases relative to a particular foreign currency, an investment denominated in that foreign currency will decrease in value because the investment will be worth fewer U.S. dollars.

Emerging Markets Investments Risk. Emerging markets securities involve unique risks, such as exposure to economies that are less diverse and mature than those of the United States or more established foreign markets. Also, emerging markets securities are subject to the same risks as foreign investments, described above. Generally, these risks are more severe for issuers in countries with emerging capital markets. Also, economic or political instability may cause larger price changes in emerging markets securities than in other foreign investments.

Political and Economic Risk. The political, legal, economic, and social structures of certain foreign countries may be less stable and more volatile than those in the United States. Investments in these countries may be subject to the risks of internal and external conflicts and currency devaluations.

Small and Medium Capitalization Stock Risk. The securities of companies with small and medium capitalizations may involve greater investment risks than securities of companies with large capitalizations. Small and medium capitalization companies may have an unproven or narrow technological base and limited product lines, distribution channels, and market and financial resources, and the small and medium capitalization companies also may be dependent on entrepreneurial management, making the companies more susceptible to certain setbacks and reversals. As a result, the prices of securities of small and medium capitalization companies may be subject to more abrupt or erratic movements than securities of larger companies, may have limited marketability, and may be less liquid than securities of companies with larger capitalizations. Foreign companies with large capitalizations may be relatively small by U.S. standards and may be subject to risks that are similar to the risks that may affect small and medium capitalization U.S. companies. Securities of small and medium capitalization companies also may pay no, or only small, dividends.

Management Techniques Risk. The investment strategies, techniques, and risk analyses employed by the subadvisors, while designed to enhance potential returns, may not produce the desired results. The subadvisors may be incorrect in their assessments of the values of securities or their assessments of market trends, which can result in losses to the Fund.

Market Risk. The risk that movements in financial markets will adversely affect the prices of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. The market as a whole may not favor the types of investments the Fund makes. Also, there is the risk that the price(s) of one or more of the securities or other instruments in the Fund’s portfolio will fall, or will fail to rise. Many factors can adversely affect a security’s performance, including both general financial market conditions and factors related to a specific company, industry, country, or geographic region.

Portfolio Turnover Risk. Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in higher brokerage commissions and transaction costs (which could reduce investment returns), and capital gains.

The Fund is not intended to serve as a complete investment program.

Performance of the Fund

The following bar chart and table give some indication of the risks of investing in the Fund by showing changes in the performance of the Fund’s Class Y-3 shares from year to year and comparing the Fund’s average annual returns over time with a broad measure of market performance.

Class S shares of the Fund had not commenced operations as of the date of this prospectus. The returns of the Class S shares would have been substantially similar to the returns of Class Y-3 shares; however, because the Class S shares are subject to a 12b-1 fee and an internal administrative fee, while the Class Y-3 shares are not, the returns of the Class S shares would have been lower than those shown for Class Y-3 shares.

The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

(2007 is Class Y-3’s first full calendar year of operation)

Calendar Year

The Fund’s calendar year-to-date return as of June 30, 2011 was 4.39%.

The Fund’s highest return for a quarter during the periods shown above was 25.91%, for the quarter ended June 30, 2009.

The Fund’s lowest return for a quarter during the periods shown above was -23.60%, for the quarter ended December 31, 2008.

Average Annual Total Returns For the Periods Ended December 31, 2010

Average Annual Total Returns MGI Non-US Core Equity Fund Class S Shares	Column	Label		Index No Deduction for Fees, Expenses, Taxes [Text]	1 Year	Life of Fund	Inception Date
Return Before Taxes Class Y-3	MGI Non-US Core Equity Fund — Class Y-3 Shares	Return Before Taxes			9.16%	(1.09%)	Aug. 18, 2006
Return After Taxes on Distributions Class Y-3	MGI Non-US Core Equity Fund — Class Y-3 Shares	Return After Taxes on Distributions			8.96%	(1.57%)	Aug. 18, 2006
Return After Taxes on Distributions and Sale of Fund Shares Class Y-3	MGI Non-US Core Equity Fund — Class Y-3 Shares	Return After Taxes on Distributions and Sale of Fund Shares			6.43%	(0.98%)	Aug. 18, 2006
MSCI EAFE Index		MSCI EAFE® Index	[1]	(reflects no deduction for fees, expenses, or taxes)	7.75%	(0.27%)	Aug. 18, 2006

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

MGI Core Opportunistic Fixed Income Fund

MGI Core Opportunistic Fixed Income Fund

Investment Objective

The investment objective of the Fund is to provide total return, consisting of both current income and capital appreciation.

Fees and Expenses

These tables summarize the fees and expenses that you may pay if you invest in the Class S Shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	MGI Core Opportunistic Fixed Income Fund Class S Shares Class S
Redemption Fee on shares owned less than 30 days (as a % of total redemption proceeds)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		MGI Core Opportunistic Fixed Income Fund Class S Shares Class S
Management Fees		0.35%
Distribution and/or Service (12b-1) Fees		0.25%
Other Expenses (including custodial, legal, audit, transfer agent and sub-transfer agent payments, Trustees' fees and expenses, and an internal administrative fee of 0.15% paid by the Class S shares of the Fund to the Advisor)	[1]	0.35%
Acquired Fund Fees and Expenses		none
Total Annual Fund Operating Expenses		0.95%
Management Fee Waiver/Expense Reimbursements		0.08%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	0.87%

Example

The example below is intended to help you compare the costs of investing in the Class S Shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Class S shares of the Fund for the time periods shown, that your investment has a 5% return each year, and that the Fund’s operating expenses remain the same as shown above.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
MGI Core Opportunistic Fixed Income Fund Class S Shares Class S	89	295	518	1,159

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 379% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests principally in investment grade fixed income securities, including government securities and corporate bonds. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in fixed income securities. The Fund also may invest in non-investment grade bonds (sometimes called high yield or junk bonds), non-U.S. dollar denominated bonds, bonds issued by issuers located in emerging capital markets, and certain derivative instruments. The Fund may invest in derivative instruments, such as options, futures, swap agreements, and mortgage- and asset-backed securities. The Fund may engage in transactions in derivatives for a variety of purposes, including changing the investment characteristics of its portfolio, enhancing total returns, or as a substitute for taking a position in the underlying asset. Generally, the Fund is managed to maintain a duration within 20% of the duration of the Barclays Capital U.S. Aggregate Bond Index (as of June 30, 2011, the duration of the Index was approximately 5.10 years). Duration is a measure of the sensitivity of the price of a debt security (or a portfolio of debt securities) to changes in interest rates. The prices of debt securities with shorter durations generally will be less affected by changes in interest rates than the prices of debt securities with longer durations.

Principal Risk Factors

The principal risks that could adversely affect the value of the Fund’s shares and the total return on your investment include:

Credit Risk. Issuers of debt securities may be unable to make the required payments of interest and/or principal at the time that such payments are due. In addition, changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness also can adversely affect the values of the issuers’ debt securities. Issuers of investment grade securities may still default on their obligations.

Interest Rate Risk. Changes in interest rates may adversely affect the values of the securities held in the Fund’s portfolio. In general, the prices of debt securities fall when interest rates increase, and rise when interest rates decrease. The prices of debt securities with shorter durations generally will be less affected by changes in interest rates than the prices of debt securities with longer durations.

Call or Prepayment Risk. During periods of falling interest rates, issuers of callable bonds may repay securities with higher interest rates before maturity. This could expose the Fund to a potential loss on any premium to face value paid and to a lower rate of return upon reinvestment of principal. Early repayment of principal of mortgage-related securities could have the same effect.

Liquidity Risk. The Fund may not be able to purchase or sell a security in a timely manner or at desired prices or achieve its desired weighting in a security.

Foreign Investments Risk. Investing in foreign securities typically involves more risks than investing in U.S. securities. These risks can increase the potential for losses in the Fund and affect its share price. Generally, securities of many foreign issuers may be less liquid, and their prices may be more volatile, than the securities of comparable U.S. issuers. Transaction costs for foreign securities generally are higher than for comparable securities issued in the United States. Many foreign governments may supervise and regulate their financial markets less stringently than the United States government does. In addition, foreign issuers generally are not subject to the same types of accounting, auditing, or financial reporting standards as those that are applicable to U.S. issuers. As a result, with respect to foreign issuers, there may be less publicly available information regarding their operations and financial conditions, and the information that is available may be less reliable.

Emerging Markets Investments Risk. Emerging markets securities involve unique risks, such as exposure to economies that are less diverse and mature than those of the United States or more established foreign markets. Also, emerging markets securities are subject to the same risks as foreign investments, described above. Generally, these risks are more severe for issuers in countries with emerging capital markets. Also, economic or political instability may cause larger price changes in emerging markets securities than in other foreign investments.

High Yield Securities Risk. Securities rated below investment grade, sometimes called “junk bonds,” generally have more credit risk than higher-rated securities, are more likely to encounter financial difficulties, and are more vulnerable to changes in the economy. Companies issuing high yield, fixed income securities are not as strong financially as those companies issuing securities with higher credit ratings. Market situations, such as a sustained period of rising interest rates, could affect the ability of companies issuing high yield, fixed income securities to make interest and principal payments. If an issuer stops making interest and/or principal payments, payments on the securities may never resume. These securities may be worthless and the Fund could lose its entire investment. The prices of high yield, fixed income securities fluctuate more than higher-quality securities, and are especially sensitive to developments affecting the company’s business and to changes in the ratings assigned by rating agencies. High yield securities generally are less liquid than higher-quality securities. Many of these securities do not trade frequently, and when the securities do trade, their prices may be significantly higher or lower than expected.

Derivatives Risk. The Fund may engage in a variety of transactions involving derivatives, such as options, futures, swap agreements, and mortgage- and asset-backed securities. Derivatives are financial instruments, the value of which depends upon, or is derived from, the value of something else, such as one or more underlying investments, pools of investments, indexes, or currencies. A subadvisor may use derivatives both for hedging and non-hedging purposes, although it is anticipated that the use of derivatives by the Fund will generally be limited to maintaining exposure to certain market segments or asset classes, or facilitating certain portfolio transactions. Investments in derivatives may be applied toward meeting a requirement to invest in a particular kind of investment if the derivatives have economic characteristics similar to that investment.

Derivatives involve special risks and may result in losses. The successful use of derivatives depends on the ability of a subadvisor to manage these sophisticated instruments. The prices of derivatives may move in unexpected ways due to the use of leverage or other factors, especially in unusual market conditions, and may result in increased volatility. Certain derivatives, such as swap agreements, are subject to counterparty risk, which is the risk that the other party in the transaction will not fulfill its contractual obligation. Some derivatives are more sensitive to interest rate changes and market movements than other instruments. The possible lack of a liquid secondary market for derivatives and the resulting inability of the Fund to sell or otherwise close a derivatives position could expose the Fund to losses and could make derivatives more difficult for the Fund to value accurately.

U.S. Government Securities Risk. U.S. government agency obligations have different levels of credit support, and therefore, different degrees of credit risk. Securities issued by agencies and instrumentalities of the U.S. government that are supported by the full faith and credit of the United States, such as the Federal Housing Administration or Ginnie Mae, present little credit risk. Other securities issued by agencies and instrumentalities sponsored by the U.S. government that are supported only by the issuer’s right to borrow from the U.S. Treasury, subject to certain limitations, such as securities issued by Federal Home Loan Banks, and securities issued by agencies and instrumentalities sponsored by the U.S. government that are supported only by the credit of the issuing agencies, such as Freddie Mac and Fannie Mae, are subject to a greater degree of credit risk.

Management Techniques Risk. The investment strategies, techniques, and risk analyses employed by the subadvisors, while designed to enhance potential returns, may not produce the desired results. The subadvisors may be incorrect in their assessments of the values of securities or their assessments of market or interest rate trends, which can result in losses to the Fund.

Market Risk. The risk that movements in financial markets will adversely affect the prices of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. The market as a whole may not favor the types of investments the Fund makes. Also, there is the risk that the price(s) of one or more of the securities or other instruments in the Fund’s portfolio will fall, or will fail to rise. Many factors can adversely affect a security’s performance, including both general financial market conditions and factors related to a specific company, industry, country, or geographic region.

Portfolio Turnover Risk. Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in higher brokerage commissions and transaction costs (which could reduce investment returns), and capital gains.

The Fund is not intended to serve as a complete investment program.

Performance of the Fund

The following bar chart and table give some indication of the risks of investing in the Fund by showing changes in the performance of the Fund’s Class Y-3 shares from year to year and comparing the Fund’s average annual returns over time with a broad measure of market performance.

Class S shares of the Fund had not commenced operations as of the date of this prospectus. The returns of the Class S shares would have been substantially similar to the returns of Class Y-3 shares; however, because the Class S shares are subject to a 12b-1 fee and an internal administrative fee, while the Class Y-3 shares are not, the returns of the Class S shares would have been lower than those shown for Class Y-3 shares.

The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

(2006 is Class Y-3’s first full calendar year of operation)

Calendar Year

The Fund’s calendar year-to-date return as of June 30, 2011 was 2.66%.

The Fund’s highest return for a quarter during the periods shown above was 6.79%, for the quarter ended September 30, 2009.

The Fund’s lowest return for a quarter during the periods shown above was -3.85%, for the quarter ended September 30, 2008.

Average Annual Total Returns For The Periods Ended December 31, 2010

Average Annual Total Returns MGI Core Opportunistic Fixed Income Fund Class S Shares	Column	Label		Index No Deduction for Fees, Expenses, Taxes [Text]	1 Year	5 Years	Life of Fund	Inception Date
Return Before Taxes Class Y-3	MGI Core Opportunistic Fixed Income Fund – Class Y-3 Shares	Return Before Taxes			7.87%	5.14%	4.88%	Aug. 15, 2005
Return After Taxes on Distributions Class Y-3	MGI Core Opportunistic Fixed Income Fund – Class Y-3 Shares	Return After Taxes on Distributions			6.08%	3.52%	3.30%	Aug. 15, 2005
Return After Taxes on Distributions and Sale of Fund Shares Class Y-3	MGI Core Opportunistic Fixed Income Fund – Class Y-3 Shares	Return After Taxes on Distributions and Sale of Fund Shares			5.11%	3.44%	3.24%	Aug. 15, 2005
Barclays Capital U.S. Aggregate Bond Index		Barclays Capital U.S. Aggregate Bond Index	[1]	(reflects no deduction for fees, expenses, or taxes)	6.54%	5.80%	5.49%	Aug. 15, 2005

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

MGI US Short Maturity Fixed Income Fund

MGI US Short Maturity Fixed Income Fund

Investment Objective

The investment objective of the Fund is to provide safety of principal and a moderate level of income.

Fees and Expenses

These tables summarize the fees and expenses that you may pay if you invest in the Class S Shares of the Fund.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	MGI US Short Maturity Fixed Income Fund Class S Shares Class S
Redemption Fee on shares owned less than 30 days (as a % of total redemption proceeds)	2.00%

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses		MGI US Short Maturity Fixed Income Fund Class S Shares Class S
Management Fees		0.25%
Distribution and/or Service (12b-1) Fees		0.25%
Other Expenses (including custodial, legal, audit, transfer agent and sub-transfer agent payments, Trustees' fees and expenses, and an internal administrative fee of 0.15% paid by the Class S shares of the Fund to the Advisor)	[1]	0.47%
Acquired Fund Fees and Expenses		none
Total Annual Fund Operating Expenses		0.97%
Management Fee Waiver/Expense Reimbursements		0.15%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement	[2]	0.82%

Example

The example below is intended to help you compare the costs of investing in the Class S Shares of the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Class S shares of the Fund for the time periods shown, that your investment has a 5% return each year, and that the Fund’s operating expenses remain the same as shown above.

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Expense Example (USD $)	1 year	3 years	5 years	10 years
MGI US Short Maturity Fixed Income Fund Class S Shares Class S	84	294	522	1,176

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 61% of the average value of its portfolio.

Principal Investment Strategies

The Fund invests principally in investment grade fixed income securities of U.S. issuers, including government securities and corporate bonds. Under normal circumstances, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes, if any) in fixed income securities of U.S. issuers. Generally, the Fund maintains an average dollar-weighted portfolio maturity of one to three years.

Principal Risk Factors

The principal risks that could adversely affect the value of the Fund’s shares and the total return on your investment include:

Credit Risk. Issuers of debt securities may be unable to make the required payments of interest and/or principal at the time that such payments are due. In addition, changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness also can adversely affect the values of the issuers’ debt securities. Issuers of investment grade securities may still default on their obligations.

Interest Rate Risk. Changes in interest rates may adversely affect the values of the securities held in the Fund’s portfolio. In general, the prices of debt securities fall when interest rates increase, and rise when interest rates decrease. Typically, the longer the maturity of a debt security, the more sensitive the debt security is to price shifts as a result of interest rate changes.

U.S. Government Securities Risk. U.S. government agency obligations have different levels of credit support, and therefore, different degrees of credit risk. Securities issued by agencies and instrumentalities of the U.S. government that are supported by the full faith and credit of the United States, such as the Federal Housing Administration or Ginnie Mae, present little credit risk. Other securities issued by agencies and instrumentalities sponsored by the U.S. government that are supported only by the issuer’s right to borrow from the U.S. Treasury, subject to certain limitations, such as securities issued by Federal Home Loan Banks, and securities issued by agencies and instrumentalities sponsored by the U.S. government that are supported only by the credit of the issuing agencies, such as Freddie Mac and Fannie Mae, are subject to a greater degree of credit risk.

Management Techniques Risk. The investment strategies, techniques, and risk analyses employed by the subadvisor, while designed to enhance potential returns, may not produce the desired results. The subadvisor may be incorrect in its assessments of the values of securities or its assessments of market or interest rate trends, which can result in losses to the Fund.

Market Risk. The risk that movements in financial markets will adversely affect the prices of the Fund’s investments, regardless of how well the companies in which the Fund invests perform. The market as a whole may not favor the types of investments the Fund makes. Also, there is the risk that the price(s) of one or more of the securities or other instruments in the Fund’s portfolio will fall, or will fail to rise. Many factors can adversely affect a security’s performance, including both general financial market conditions and factors related to a specific company, industry, country, or geographic region.

Portfolio Turnover Risk. Depending on market and other conditions, the Fund may experience high portfolio turnover, which may result in higher brokerage commissions and transaction costs (which could reduce investment returns), and capital gains.

The Fund is not intended to serve as a complete investment program.

Performance of the Fund

The following bar chart and table give some indication of the risks of investing in the Fund by showing changes in the performance of the Fund’s Class Y-3 shares from year to year and comparing the Fund’s average annual returns over time with a broad measure of market performance.

Class S shares of the Fund had not commenced operations as of the date of this prospectus. The returns of the Class S shares would have been substantially similar to the returns of Class Y-3 shares; however, because the Class S shares are subject to a 12b-1 fee and an internal administrative fee, while the Class Y-3 shares are not, the returns of the Class S shares would have been lower than those shown for Class Y-3 shares.

The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

(2006 is Class Y-3’s first full calendar year of operation)

Calendar Year

The Fund’s calendar year-to-date return as of June 30, 2011 was 1.05%.

The Fund’s highest return for a quarter during the periods shown above was 5.13%, for the quarter ended June 30, 2009.

The Fund’s lowest return for a quarter during the periods shown above was -6.28%, for the quarter ended December 31, 2008.

Average Annual Total Returns For the Periods Ended December 31, 2010

Average Annual Total Returns MGI US Short Maturity Fixed Income Fund Class S Shares	Column	Label		Index No Deduction for Fees, Expenses, Taxes [Text]	1 Year	5 Years	Life of Fund	Inception Date
Return Before Taxes Class Y-3	MGI US Short Maturity Fixed Income Fund – Class Y-3 Shares	Return Before Taxes			3.49%	3.26%	3.20%	Aug. 22, 2005
Return After Taxes on Distributions Class Y-3	MGI US Short Maturity Fixed Income Fund – Class Y-3 Shares	Return After Taxes on Distributions			2.91%	1.85%	1.78%	Aug. 22, 2005
Return After Taxes on Distributions and Sale of Fund Shares Class Y-3	MGI US Short Maturity Fixed Income Fund – Class Y-3 Shares	Return After Taxes on Distributions and Sale of Fund Shares			2.27%	1.95%	1.89%	Aug. 22, 2005
Barclays Capital Government/Credit 1-3 Year Bond Index		Barclays Capital Government/Credit 1-3 Year Bond Index	[1]	(reflects no deduction for fees, expenses, or taxes)	2.80%	4.53%	4.38%	Aug. 22, 2005

After-tax returns are calculated using the historical highest individual federal marginal income tax rates in effect and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

[1] The "Other Expenses" shown are based on estimated amounts for the Fund's current fiscal year, as the Class S shares of the Fund had not commenced operations as of the date of this prospectus.

[2] The Trust, with respect to the Fund, and Mercer Global Investments, Inc. (the "Advisor") have entered into a written contractual fee waiver and expense reimbursement agreement (the "expense reimbursement agreement") pursuant to which the Advisor has agreed to waive a portion of its fees and/or to reimburse expenses to the extent that the Fund's expenses (not including brokerage fees and expenses, interest, and extraordinary expenses) otherwise would exceed 1.07% for the Class S shares of the Fund. Pursuant to the expense reimbursement agreement, the Advisor is entitled to be reimbursed for any fees the Advisor waives and Fund expenses that the Advisor reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limitation that is in place for the Fund. The expense reimbursement agreement will remain in effect through July 31, 2012, and will continue in effect from year to year thereafter unless terminated by the Trust or the Advisor.

[1] The Russell 1000(R) Growth Index measures the performance of those Russell 1000(R) companies with higher price-to-book ratios and higher forecasted growth values. The index is unmanaged and cannot be invested in directly.

[1] The "Other Expenses" shown are based on estimated amounts for the Fund's current fiscal year, as the Class S shares of the Fund had not commenced operations as of the date of this prospectus.

[2] The Trust, with respect to the Fund, and the Advisor have entered into a written contractual fee waiver and expense reimbursement agreement (the "expense reimbursement agreement") pursuant to which the Advisor has agreed to waive a portion of its fees and/or to reimburse expenses to the extent that the Fund's expenses (not including brokerage fees and expenses, interest, and extraordinary expenses) otherwise would exceed 1.05% for the Class S shares of the Fund. Pursuant to the expense reimbursement agreement, the Advisor is entitled to be reimbursed for any fees the Advisor waives and Fund expenses that the Advisor reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limitation that is in place for the Fund. The expense reimbursement agreement will remain in effect through July 31, 2012, and will continue in effect from year to year thereafter unless terminated by the Trust or the Advisor.

[1] The Russell 1000(R) Value Index measures the performance of those Russell 1000(R) companies with lower price-to-book ratios and lower forecasted growth values. The index is unmanaged and cannot be invested in directly.

[1] The "Other Expenses" shown are based on estimated amounts for the Fund's current fiscal year, as the Class S shares of the Fund had not commenced operations as of the date of this prospectus.

[2] The Trust, with respect to the Fund, and the Advisor have entered into a written contractual fee waiver and expense reimbursement agreement (the "expense reimbursement agreement") pursuant to which the Advisor has agreed to waive a portion of its fees and/or to reimburse expenses to the extent that the Fund's expenses (not including brokerage fees and expenses, interest, and extraordinary expenses) otherwise would exceed 1.42% for the Class S shares of the Fund. Pursuant to the expense reimbursement agreement, the Advisor is entitled to be reimbursed for any fees the Advisor waives and Fund expenses that the Advisor reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limitation that is in place for the Fund. The expense reimbursement agreement will remain in effect through July 31, 2012, and will continue in effect from year to year thereafter unless terminated by the Trust or the Advisor.

[1] The Russell 2500(TM) Growth Index measures the performance of those Russell 2500(TM)companies with higher price-to-book ratios and higher forecasted growth values. The index is unmanaged and cannot be invested in directly.

[1] The "Other Expenses" shown are based on estimated amounts for the Fund's current fiscal year, as the Class S shares of the Fund had not commenced operations as of the date of this prospectus.

[2] The Trust, with respect to the Fund, and the Advisor have entered into a written contractual fee waiver and expense reimbursement agreement (the "expense reimbursement agreement") pursuant to which the Advisor has agreed to waive a portion of its fees and/or to reimburse expenses to the extent that the Fund's expenses (not including brokerage fees and expenses, interest, and extraordinary expenses) otherwise would exceed 1.42% for the Class S shares of the Fund. Pursuant to the expense reimbursement agreement, the Advisor is entitled to be reimbursed for any fees the Advisor waives and Fund expenses that the Advisor reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limitation that is in place for the Fund. The expense reimbursement agreement will remain in effect through July 31, 2012, and will continue in effect from year to year thereafter unless terminated by the Trust or the Advisor.

[1] The Russell 2500(TM) Value Index measures the performance of those Russell 2500(TM) companies with lower price-to-book ratios and lower forecasted growth values. The index is unmanaged and cannot be invested in directly.

[1] The "Other Expenses" shown are based on estimated amounts for the Fund's current fiscal year, as the Class S shares of the Fund had not commenced operations as of the date of this prospectus.

[2] The Trust, with respect to the Fund, and the Advisor have entered into a written contractual fee waiver and expense reimbursement agreement (the "expense reimbursement agreement") pursuant to which the Advisor has agreed to waive a portion of its fees and/or to reimburse expenses to the extent that the Fund's expenses (not including brokerage fees and expenses, interest, and extraordinary expenses) otherwise would exceed 1.32% for the Class S shares of the Fund. Pursuant to the expense reimbursement agreement, the Advisor is entitled to be reimbursed for any fees the Advisor waives and Fund expenses that the Advisor reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limitation that is in place for the Fund. The expense reimbursement agreement will remain in effect through July 31, 2012, and will continue in effect from year to year thereafter unless terminated by the Trust or the Advisor.

[1] The MSCI EAFE(R) Index measures the performance of equity securities in developed markets outside of North America, including Europe, Australasia, and the Far East. The index is unmanaged and cannot be invested in directly.

[1] The "Other Expenses" shown are based on estimated amounts for the Fund's current fiscal year, as the Class S shares of the Fund had not commenced operations as of the date of this prospectus.

[2] The Trust, with respect to the Fund, and the Advisor have entered into a written contractual fee waiver and expense reimbursement agreement (the "expense reimbursement agreement") pursuant to which the Advisor has agreed to waive a portion of its fees and/or to reimburse expenses to the extent that the Fund's expenses (not including brokerage fees and expenses, interest, and extraordinary expenses) otherwise would exceed 0.87% for the Class S shares of the Fund. Pursuant to the expense reimbursement agreement, the Advisor is entitled to be reimbursed for any fees the Advisor waives and Fund expenses that the Advisor reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limitation that is in place for the Fund. The expense reimbursement agreement will remain in effect through July 31, 2012, and will continue in effect from year to year thereafter unless terminated by the Trust or the Advisor.

[1] The Barclays Capital U.S. Aggregate Bond Index is an index that measures the performance of securities from the Barclays Capital U.S. Government/Corporate Bond Index, Mortgage-Backed Securities Index, and Asset-Backed Securities Index. The Barclays Capital U.S. Aggregate Bond Index is a broad representation of the investment-grade fixed-income market in the United States and includes U.S. government and corporate debt securities, mortgage- and asset-backed securities, and international U.S. dollar-denominated bonds. All securities contained in the Barclays Capital U.S. Aggregate Bond Index have a minimum term to maturity of one year. The index is unmanaged and cannot be invested in directly.

[1] The "Other Expenses" shown are based on estimated amounts for the Fund's current fiscal year, as the Class S shares of the Fund had not commenced operations as of the date of this prospectus.

[2] The Trust, with respect to the Fund, and the Advisor have entered into a written contractual fee waiver and expense reimbursement agreement (the "expense reimbursement agreement") pursuant to which the Advisor has agreed to waive a portion of its fees and/or to reimburse expenses to the extent that the Fund's expenses (not including brokerage fees and expenses, interest, and extraordinary expenses) otherwise would exceed 0.82% for the Class S shares of the Fund. Pursuant to the expense reimbursement agreement, the Advisor is entitled to be reimbursed for any fees the Advisor waives and Fund expenses that the Advisor reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limitation that is in place for the Fund. The expense reimbursement agreement will remain in effect through July 31, 2012, and will continue in effect from year to year thereafter unless terminated by the Trust or the Advisor.

[1] The Barclays Capital Government/Credit 1-3 Year Bond Index is an index which measures the performance of U.S. corporate and government bonds with maturities of between 1 and 3 years. The index is unmanaged and cannot be invested in directly.